overleaf/services/web/frontend/js/features/source-editor/themes/cm6/github.json

{
  "theme": {
    ".cm-gutters": {
      "backgroundColor": "transparent",
      "borderRightColor": "transparent",
      "background": "#e8e8e8",
      "color": "#AAA"
    },
    "&": {
      "background": "#fff",
      "color": "#000"
    },
    ".cm-cursor, .cm-dropCursor": {
      "color": "black"
    },
    ".cm-activeLine": {
      "background": "rgb(245, 245, 245)"
    },
    "&.cm-focused > .cm-scroller > .cm-selectionLayer .cm-selectionBackground, .cm-selectionBackground, .cm-content ::selection, .cm-searchMatch.cm-searchMatch.cm-searchMatch-selected": {
      "background": "rgb(181, 213, 255)"
    },
    "&.cm-focused .cm-matchingBracket, &.cm-focused .cm-nonmatchingBracket": {
      "margin": 0,
      "outline": "1px solid rgb(192, 192, 192)"
    },
    ".cm-activeLineGutter": {
      "backgroundColor": "rgba(0, 0, 0, 0.07)"
    },
    ".cm-selectionMatch.cm-selectionMatch, .cm-searchMatch.cm-searchMatch": {
      "background": "rgb(250, 250, 255)",
      "outline": "1px solid rgb(200, 200, 250)",
      "margin": 0
    }
  },
  "highlightStyle": {
    ".tok-keyword": {
      "fontWeight": "bold"
    },
    ".tok-string": {
      "color": "#D14"
    },
    ".tok-literal": {
      "color": "#099",
      "fontWeight": "bold"
    },
    ".tok-comment": {
      "color": "#998",
      "fontStyle": "italic"
    },
    ".tok-variableName": {
      "color": "#0086B3"
    },
    ".tok-regexp": {
      "color": "#009926",
      "fontWeight": "normal"
    }
  },
  "dark": false
}